Germproof paper milk container



July l5, 1941.

o. E. SEIFFERT GERMPROOF PAPER MILK CONTAINER Filed July 28, 19158 A INVEINTOR OTTO E SEIFFERT M AT 0%NEY Patented July 15, 1941 UNITED STATES PATENT OFFICE 3 Claims.

This invention relates to new and useful improvements in a paper milk container.

The invention has for an object the construction of a paper milk container which is characterized by a normally closed opening through which the milk may be poured, and arranged in a manner so that in the closed position the pourin edge portions of the container are cov-.

ered and thus protected from dust and dirt which may contain harmful germs.

A further object of the invention resides in so constructing the container that it is characterized by acontainer body with an open top and a cover for closing the top having its edges and the top edges of the container turned into a double rolled seam to form a water proof joint. It is proposed to so arrange the cover that a por tion thereof may be pulled out from the double rolled seam and a portion of the cover may be bent upwards to form the pouring opening previously referred to. With this construction, it should be noted, in the closed position of the cover the cover will protect the pouring edge of r the container.

Still further the invention proposes to construct the container substantially square in transverse cross section, except to provide it with rounded corners. When thus constructed it is possible to readily stack the containers andto reduce to a minimum the space between the stacked containers. This is desirable in order to prevent ice which is generally used for keeping the milk fresh during transportation, from falling in between the containers.-

Another object of this invention resides in slightly tapering the walls of the container in a manner so that the cover of the container which is connected with the top edge of the container be a double rolled seam, be substantially of the samedimensions as the bottom dimensions of the container. This construction assists in the tight and secure stackin of the containers, when desired.

Still further the invention proposes a novel construction of the container body, particularly the bottom thereof, to insure inexpensive construction and which will efliciently maintain a water proof joint to render the container water proof. Specifically, it is proposed to form certain shoulders and grooves in the bottom of the container as hereinafter more fully described.

It is also proposed to construct the cover of the container with a reinforcing groove to add to the rigidity thereof.

Still further, the invention contemplates in a modified form of the invention the provision of a window opening in the side wall of the container body through which the cream content of the milk may readily be viewed.

Another object of the invention is to construct the container body so that the cover'thereof may be readily applied and double seamed thereto after the container has been filled with milk. The advantage of this construction resides in the fact that with the cover off, the entire interior surface of the container is exposed. In this condition sterilizing rays or other similar rays may be directed into the container for sterilizing the same.

Still further the invention proposes the use of a thin film of wax for assisting in rendering the containeriand cover water proof. It is proposed to form this thin film by blowing excess wax off the container parts while the wax is still in a molten condition.

Another object of ,the invention is the construction of a device as described, which is simple and durable in construction, and which may be manufactured and sold at a reasonable cost.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which thevarious'novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part of this disclosure:

Fig. 1 is a perspective view of a paper milk container constructed according to this invention.

Fig. 2 is a fragmentary perspective view of the top portion of the container shown in Fig. 1 with the cover in an open position. v

Fig. 3 is a fragmentary vertical sectional view taken on the line 3-3 of Fig. 1.

Fig. 4 is a fragmentary vertical sectional view taken on the line 44 of Fig. 1. v

Fig. 5 is a fragmentary side elevational view of a paper milk container constructed according to a modification of this invention.

The germ-proof milk container, according to this invention, includes a container body l0 made .from paper, or water proof paper or the like and having a closed bottom H and an open top. The

open top, in the closed position of the container, is closed with a cover 12 made from paper, or water proof paper or the like. This cover I! has its edges l2a double roll seamed with the top edges Hla of the container body to form a water proof double rolled seam. The cover I2 is also formed with a depressed portion |2b extended around its periphery and adapted to extend into the top of the container body in intimate contact with the inside wall thereof for assisting in forming the water tight seam and for reinforcing and stiffening the cover proper.

The container body III is substantially square in horizontal cross section except for the corners which are slightly rounded. These comers are rounded for manufacturing purposes. The body issubstantially square to permit stacking of the containers when required. The walls of the container body are tapered so that the outer-edge of the double rolled seam is substantially in line with the bottom edge of the container body. In Fig. 3 the dot and dash line AB indicates the same sizes of these parts. With this construction it is possible to stack the containers, and I adjacent containers will engage each other firmly with the top and bottom parts thereof contacting.

The container bottom I I is mounted within the container body by having the bottom edge portions Illa of the container body engaged over the edge area of the bottom II. At the overlapping portions the parts are formed with a groove I 4 serving a double function. This groove forms a tortuous path between the contacting faces of the parts I Ila and the bottom II to assist in forming a water proof joint. Also, the groove I4 serves to reinforce and stiffen these parts. These overlapping portions are secured together with a suitable water proof adhesive material. The edge portions Inc of the container body are sufficiently shallow to permit being bent at right angles to the container body I 0 without the necessity of cutting out darts, and relies merely upon slight folds formed in the flange portion Illa, particularly at the corners of the container body.

A pull tab I5 is formed upon a portion of one edge of the cover I2 and continues from the material of the cover. This pull tab I5 extends a short distance downwards along the outside of the container body. Since it continues from the edge portion of the cover (see particularly Fig.

4) it is adapted to be pulled downwards to open a small portion of the double rolled seam so that a portion of the cover is freed. This free portion may be bent upwards to open a portion of the top of the container.

In Fig. 1 the'dot and dash lines I5 indicate the pulled down position of the tab I5. The inclined side portions I5a indicate small side extensions which connect with the sides of the pull tab and which continue from the edge of the cover and which are drawn outwards from the double rolled seam when the pull tab is pulled downwards. A score line I6 is extended across the top of the cover I2 between the extremities of the extensions I 50 and is used to make it easy to bend up 'a portion of the cover I2 when the pull tab is pulled downwards.

In Fig. 2 the freed portion of the cover is shown bent upwards. The open comer of the container may be used as a pouring spout. An important feature of this invention resides: in the fact that the now exposed top edge of the container, which was exposed when the cover was bent backwards, originally was encased and sealed by the cover and so protected against contamination during shipment and handling of the container. Immediately after some milk is poured from the container the cover may be bent down to again extend over the complete top edge of the'container body and so again seal the container body as long as there is still some milk within the container.

While the container has been specifically described as a milk container it should be understood that it may hold other fluids such as orangeade, lemonade and the like.

The container bottom II and the cover I2 are formed with a plurality of pressed out areas 20 to reinforce and stiffen these parts. The double rolled seam at the edges I-IIa, In is formed as shown in Fig. 3. The extreme edge portion I2aa of the rolled edge I2a is directed downwards and is encased by the edge portion In which is forced inwards so as to be in intimate contact with the side wall of the container body III. The extra turned edge portion I2aa. materially assists in forming a water proof joint.

In Fig. 5 a modification of the invention has been disclosed which distinguishes from the prior form in the fact that the milk container has a container body IIl' formed with a window opening IT. This window opening is closed by a transparent sheet of material I8 which is extended across the window opening and which is secured by its edges to the edge portions of the opening with a suitable water proof adhesive. The purpose of this window opening I1 is to permit inspection of the liquid contents of the container. If it is milk it is possible to inspect the amount of cream at the top of the milk. It is also possible to inspect the amount of liquid within the container without having to open the top.

While I have illustrated and described my invention with some degree of particularity, I realize that in'practice various alterations therein may be made. I therefore reserve the right and privilege of changing the form of the details of construction or otherwise altering the arrangement of the correlated parts without departing from the spirit or the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is:

1. A germ-proof paper liquid container, comprising a water proof paper or the like container body open at the top and of paper of uniform thickness throughout its area, a water proof paper or the like cover for said body extended across said open top and having its edges and the top edges of said container body turned into a double rolled seam, and said cover being of paper of uniform thickness throughout its area and a pull tab continuing from a portion of the edge of said cover and extending a short distance downward along the side of said container body, whereby a person may pull the pull tab with the thumb and index finger to open up a small portion of said double rolled'seam so that the freed portion of the cover may be bent upwards and the opening used to pour out the liquid and then the bent up portion of the cover may be bent downwards with ones fingers to reclose the container, said container body being substantially square in transverse cross section and having rounded corners, and the sides of said container body being tapered so that the dimensions of the perimeter of the double rolled seam are substantially identical with the dimensions of the perimeter of the bottom of the conopen top and having its edges and the top edges of said container body turned into .a double rolled and a pull tab continuing from a portion or the edge or said cover and extending a short distance downward along the side of said container body and adapted to be pulled to open up a small portion or said double rolled seam so that the freed portion of the cover may be bent up-' the like cover for said body extended across said 20 open top and having its edges and the top edges of said container body turned into a double rolled seam, and a pull tab continuing from a portion of the edge of said cover and extending a short distance downward along the side oi said container body and adapted to be pulled to open up a small portion of saiddouble rolled seam so that the freed portion 0! the cover may be bent upwards and the opening used to pour out the liquid, said container body and cover being substantially square in transverse cross section, and said pull tab being disposed centrally of one of the corners thereof, and side extensions from the sides of said pull tab joining with the edges of the cover at short distances inwards from said corner, and a score line across the cover between the extemities of said side extensions to assist in folding a portion of the cover when the container is opened.

O'I'IO E. SEIFFERT. 

